From 4ea794a52253ee56573922a15a64606ec82248a5 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Mon, 10 Jun 2019 17:24:15 +0200
Subject: [PATCH] Avoid unintentional activation of TLS code via USE_TLS=0

fixes #2149
---
 Makefile.system | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile.system b/Makefile.system
index 44eacda4b..c24647d62 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -1070,7 +1070,7 @@ ifdef USE_SIMPLE_THREADED_LEVEL3
 CCOMMON_OPT	+= -DUSE_SIMPLE_THREADED_LEVEL3
 endif
 
-ifdef USE_TLS
+ifeq ($(USE_TLS), 1)
 CCOMMON_OPT += -DUSE_TLS
 endif